Comp Cams GP966 Severe duty valve springs for GX240 to GX390 engines.
Made of high-quality alloy
Approximately 54lb @ 1.15" spring height, 1.65" free height
Use as single springs. Package may come with optional inner springs.
These springs are highly recommended when removing your stock governor! Without them, the engine will not rev much past 4500, and the stock valves will float, eventually causing engine damage.
Must be used with our Aluminium Retainer & Split Keeper Set.
